.section-about {
    user-select: none;
    position: relative;
    height: 100%;

    @media screen and (max-width: 325px) {
        font-size: 14px;
    }

    .inner {
        position: absolute;
        position: absolute;
        top: 0;
        right: 0;
        left: 0;
        bottom: 0;
        margin: auto;
        height: px2rem(855px);

        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .shadow {
        position: absolute;
        top: 0;
        bottom: 0;
        right: 0;
        left: 0;
        margin: 0;
        background: url('./_imgs/about_shadow.png') center bottom #{px2rem(100)} / 100% no-repeat;
    }

    .header-nav {
        position: relative;
        z-index: 2;
        ul {
            display: flex;
            justify-content: center;
            // position: absolute;
            // top: px2rem(103);
            // left: 0;
            // right: 0;
            margin: auto;
            list-style-type: none;
        }

        li {
            flex: 0 0 px2rem(180px);
            height: px2rem(40px);
            font: {
                size: px2em(16px);
                weight: bold;
            }
            color: #56697f;
            line-height: px2rem(40px);
            text-align: center;
            background: #fff;
            border: 1px solid #191919;
            cursor: pointer;

            &:not(:first-child) {
                margin-left: 4px;
            }

            &.active {
                background: #282c48;
                color: #fff;
            }
        }
    }

    .swiper-pagination {
        bottom: 1px;
    }

    .swiper-pagination-bullet {
        width: px2rem(71px);
        height: px2rem(3px);
        background: #d6e1f5;
        opacity: 1;
        border-radius: 0;
    }

    .swiper-pagination-bullet-active {
        background: linear-gradient(to right, #4458fa 0, #5ed6ee 100%);
    }

    .details {
        margin: auto;
        flex: 0 0 px2rem(695);
        width: px2rem(580);

        .swiper-wrapper {
            padding-top: px2rem(50px);
        }

        .swiper-slide {
            flex: 0 0 px2rem(337);
            display: flex;
            flex-direction: column;
            justify-content: flex-start;
            position: relative;
            width: px2rem(337px);
            height: px2rem(503px);
            padding: 0 px2rem(30px);
            color: rgba($color: #fff, $alpha: 0.4);
        }

        .swiper-slide-active {
            margin: px2rem(503 - 607) / 2 0 0 px2rem(337 - 405) / 2;
            flex: 0 0 px2rem(405);
            height: px2rem(607);
            color: #fff;
            z-index: 1;

            h2 {
                color: #b7cfff;
            }
        }

        h2 {
            margin: px2rem(35px auto 0);
            font: {
                size: px2em(22px);
                weight: normal;
            }
            letter-spacing: 0.5em;
            color: rgba(#b7cfff, 0.4);
            line-height: 1;
            text-align: center;
        }

        h3 {
            margin: px2rem(35px auto 0);
            font-size: px2em(16px);
            font-weight: bold;
            line-height: px2em(24px, 17px);
        }

        .scroller {
            flex: 1;
            margin: px2rem(20px) auto 1em;
            width: 100%;
            overflow: auto;
        }

        .content {
            font-size: px2em(13px);
            line-height: px2em(24px, 13px);
            text-align: justify;
            text-justify: inter-ideograph;

            > p {
                margin: 0;
            }
        }

        .intro {
            &.swiper-slide-active {
                background: url('./_imgs/about_intro.png') center / cover;
            }
            background: url('./_imgs/about_intro_not.png') center / cover;
        }

        .survey {
            &.swiper-slide-active {
                background: url('./_imgs/about_survey.png') center / cover;
            }
            background: url('./_imgs/about_survey_not.png') center / cover;
        }

        .advantage {
            &.swiper-slide-active {
                background: url('./_imgs/about_advantage.png') center / cover;
            }
            background: url('./_imgs/about_advantage_not.png') center / cover;
            dt {
                font-size: px2em(16px);
                font-weight: bold;
                line-height: px2em(28px, 16px);

                &:not(:first-child) {
                    margin: px2rem(25px 0 0);
                }
            }

            dd {
                margin: 0;
            }
        }
    }
}
